<?php

namespace Think;

class Mypage {   
          private $total;      //总记录   
          private $pagesize;    //每页显示多少条   
          private $firstRow;          //limit   
          private $page;           //当前页码   
          private $pagenum;      //总页码   
          private $url;           //地址   
          private $bothnum;      //两边保持数字分页的量  
          private $listRows; 
     
      //构造方法初始化   
      public function __construct($_total, $_pagesize) {   
         $this->total = $_total ? $_total : 1;   
         $this->pagesize = $_pagesize;   
         $this->pagenum = ceil($this->total / $this->pagesize);   
         $this->page = $this->setPage();   
         $this->firstRow = ($this->page-1)*$this->pagesize;   
         $this->url = $this->setUrl();   
         $this->bothnum = 2;
         $this->listRows = $this->pagesize;
      }   
     
      //拦截器   
      private function __get($_key) {   
         return $this->$_key;   
      }   
     
      //获取当前页码   
      private function setPage() {   
         if (!empty($_GET['page'])) {   
                if ($_GET['page'] > 0) {   
                   if ($_GET['page'] > $this->pagenum) {   
                          return $this->pagenum;   
                   } else {   
                          return $_GET['page'];   
                   }   
                } else {   
                   return 1;   
                }   
         } else {   
                return 1;   
         }   
      }    
     
      //获取地址   
      private function setUrl() {   
         $_url = $_SERVER["REQUEST_URI"];   
         $_par = parse_url($_url);   
         if (isset($_par['query'])) {   
                parse_str($_par['query'],$_query);   
                unset($_query['page']);   
                $_url = $_par['path'].'?'.http_build_query($_query);   
         }   
         return $_url;   
      }     //数字目录   
      private function pageList() {   
         for ($i=$this->bothnum;$i>=1;$i--) {   
            $_page = $this->page-$i;   
            if ($_page < 1) continue;   
                $_pagelist .= ' <a href="'.$this->url.'&page='.$_page.'">'.$_page.'</a> ';   
         }   
         $_pagelist .= ' <span class="me">'.$this->page.'</span> ';   
         for ($i=1;$i<=$this->bothnum;$i++) {   
            $_page = $this->page+$i;   
                if ($_page > $this->pagenum) break;   
                $_pagelist .= ' <a href="'.$this->url.'&page='.$_page.'">'.$_page.'</a> ';   
         }   
         return $_pagelist;   
      }   
     
      //首页   
      private function first() {   
         if ($this->page > $this->bothnum+1) {   
                return ' <a href="'.$this->url.'">1</a> ...';   
         }   
      }   
     
      //上一页   
      private function prev() {   
         if ($this->page == 1) {   
                return '<span class="disabled">上一页</span>';   
         }   
         return ' <a href="'.$this->url.'&page='.($this->page-1).'">上一页</a> ';   
      }   
     
      //下一页   
      private function next() {   
         if ($this->page == $this->pagenum) {   
                return '<span class="disabled">下一页</span>';   
         }   
         return ' <a href="'.$this->url.'&page='.($this->page+1).'">下一页</a> ';   
      }   
     
      //尾页   
      private function last() {   
         if ($this->pagenum - $this->page > $this->bothnum) {   
                return ' ...<a href="'.$this->url.'&page='.$this->pagenum.'">'.$this->pagenum.'</a> ';   
         }   
      }   
     
      //分页信息   
      public function showpage() {   
         $_page .= $this->first();   
         $_page .= $this->pageList();   
         $_page .= $this->last();   
         $_page .= $this->prev();   
         $_page .= $this->next();   
         return $_page;   
      }   
 }   
?>